Aquarium co-op fertilizer crystalized??

[Crywitch]

Hi there, 

Just wondering if anyone else has had this problem or not and if there's a way to fix it. I kept the fertilizer in the fridge and realized after a while that you don't need to keep it cold after doing some research. I noticed that the liquid inside has developed crystals so I left the bottle out over night hoping it was just ice. Next day, the fertilizer is still crystallized. Is there a way to fix this/ is it safe to still use in my aquariums?

Thanks!

[KBOzzie59]

I'm almost positive this has happened to "almost" everyone.  Mine happen at the exit of the pump.  For crystals inside the bottle, just shake gently until they dissolve back into the liquid.  It is still safe to use.

[Cory]

You need to shake the bottom. If you store the fertilizer at colder temperatures, not as many minerals can be dissolved into the water. We run this fertilizer basically as concentrated as we can. So cold temperatures will develop the "crystals" you are seeing. Let it be room temp, and give it a shake, most of it should dissolve back in over a week or so.

[ChefConfit]

I had this happen to me about a month after I bought my fist bottle. Shaking it before every use fixes it. A toothpick helps clear the spout of any crystals that form there.